Lead Python Developer (FinTech)

Quick Facts

• Role: Lead Python Developer (FinTech)
• Focus: Python data processing, trading database SQL, and CI/CD pipeline execution
• Work hours: extend to 8–9 PM

Description

Build Python-driven data processing workflows and manage deployment pipelines for large-scale systems and trading databases. Refine SQL queries, collaborate via Git (branching, Pull Requests, code review), and reconcile results across multiple sources when working with large datasets such as loan-level tapes and model outputs.

Responsibilities

• Build Python-based data processing workflows and manage virtual environments
• Craft and fine-tune SQL queries for trading databases
• Use Git for branching, creating Pull Requests, and code review
• Perform CI/CD tasks: builds, testing, deployments, and rollbacks
• Analyze large datasets, including loan-level tapes and model outputs
• Reconcile outputs from multiple sources and investigate discrepancies
• Document and explain variances found during data reconciliation

Requirements

• Minimum 7 years working as a Python Developer
• Strong command of Python, Pandas, and NumPy
• Experience using conda, poetry, and uv for package and environment management
• Expertise in crafting and refining SQL queries
• Experience handling large, unstructured datasets such as loan-level tapes and model outputs
• Ability to reconcile two sets of results and articulate the reasoning behind differences
• Hands-on Git experience (branching, Pull Requests, and code review)
• English proficiency at B2+ level or higher

Benefits

• Hybrid work by design, with opportunity to work remotely within Poland
• Chance to work abroad for up to 60 days annually
• Career development programs and mentoring
• Thought leadership, soft skills and well-being programs
• Certification options (Anthropic, Gemini, GCP, Azure, AWS)
• English classes
• Stable pay
• Employee Stock Purchase Plan with a 15% discount
• Benefits package (health insurance, multisport, shopping vouchers)
• Referral bonuses up to $2,000
• Corporate, social and well-being events